fix(user-center): 1:1 port reference sidebar statistics row and icon box line-height

- Rewrite sidebar stats as a single zib-widget row (user-statistics-item, em14 / em09 opacity5 mt6), drop legacy .uc-stats styles
- Restore reference body line-height (1.42857143) on stats and service/settings boxes
- Move 我的订单 to the front of 我的服务 to match reference order

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

inc/helpers/user-center-renderers/sidebar-nav.php

@@ -19,26 +19,26 @@ $orders_url = $orders_available ? (string) ($orders_url ?? '') : '';
 $tickets_available = isset($dashboard_tabs['tickets']);
 $tickets_url = $tickets_available ? aksrt_get_user_center_tab_url('tickets') : '';
 
+// 参考主题由 zibpay 把「我的订单」前插到按钮组最前，其后才是等级 / 认证。
 $services = array_values(array_filter([
+	[
+		'label' => __('我的订单', 'aksrt'),
+		'icon'  => 'order-color',
+		'url'   => $orders_url,
+		'tab'   => 'orders',
+	],
 	[
 		'label' => __('我的等级', 'aksrt'),
 		'icon'  => 'trend-color',
 		'url'   => $level_url,
 		'tab'   => 'level',
 	],
-
 	[
 		'label' => __('官方认证', 'aksrt'),
 		'icon'  => 'user-auth',
 		'url'   => $auth_url,
 		'tab'   => 'auth',
 	],
-	[
-		'label' => __('我的订单', 'aksrt'),
-		'icon'  => 'order-color',
-		'url'   => $orders_url,
-		'tab'   => 'orders',
-	],
 	[
 		'label' => __('工单中心', 'aksrt'),
 		'icon'  => 'manual-service',